hebern



E. H. HEBERN,

ELECTRIC TYPEWRITING MACHINE Nov. 6 1 923 Filed sept. a, 1919 2Sheets-Sheet 1 /N VEN 717/? E H. HEBER/V Nov. 6 1923.

E. H. HEBERN ELECTRIC TYPEWRITING MACHINE Filed Sept. 8, 1919 2Sheets-Sheet 2 ne '06 /NvsA/rD/P .s H. sae-@N er zum n Patented Nov. 6,1923 unire srrss rarest EDWARD H. HEBEBJN, F OAKLAND, CALIFORNA,ASSIGNOR TO H & H PATENT DE- VELOPING COMPANY, OF OAKLAND, CALFORNIA.

ELECTRIC TYPEWRTNG MACHINE.

Application filed September 8, 1919. Serial No. 322,568.

` ToaZZ-whom t may concern:

Be it known that I, EDWARD 'Hg HEBERN,

a'citizen of the United States,residing at' Oakland, in the county ofAlameda; and State of California, have invented Anew and usefulImprovements in Electric Typewriting Machines, of which the following isa specification. i

Theobject of the present yinvention is to provide an improved electrictypewriting machine, such that asmall depression of the typewriter keyswill be sufficient to actuate the type 'for printing, and by which theprinting can be effected more easily and `quickly than heretofore, andwith absolute uniformity of pressure, notwithstanding variations in thepressure applied to the keys by the operator.

In the accompanying drawing, Figure 1 is a transverse vertical section'of my imi` proved electric typewriting machine, certain parts notmaterial to the invention being omitted; Figure 2 is a front `view of adetail; Figure 3 is a sectional view of a detail of construction; Figure4 is a broken view similar'toy Figure 1, but with the parts shown in adifferent position from that shown in Figure 1; Figure 5 is a sectionalview of a disc; Fig. 6 is a view in elevation of the disk shown in Fig.5; Figure 7 is a broken transverse vertical section showing amodification of the invention; Figure 8 is a similar view, but lookingfrom the opposite side, of parts employed in such modifi cation.

Referring to the drawing, 1 indicates a frame or casting supporting mostof the apparatus for converting any ordinary typewriting machine to myimproved electric typewriting machine and supporting the ordinarytypewriter upon bosses 2, screws passed through said bossesbeing'screwed into the frame. of said typewriting machine to secure itto said frame 1; 4 indicates the keys ofthe typewriting machineconnected to key bars 6 pivoted at l7, and to said key bars 6 arepivota'lly attached, as shown at 8, hangers 9, the lower ends of whichcarry pins 11 movable in vertically extending slots 12 in the front endsof key levers 13 pivoted at 14. To each hanger is pivoted, as shown Vat16, the central portion of a dat spring 17 the ends of the pins 8 and 11respectively on opposite sides of a key bar 6 and lever 13 respectively.The lower endl of said hanger is enlarged or extended forwardly, asshown at 18, to engage and lift up the reduced end of a contact carrier19 of fiber or other insulating material, pivoted to a bar 21 extendinglongitudinally of the machine and carrying .a contact 22 pressed down bya spring 23. rlhe slightest pressure on the typewriter key removes theextension 18 from engagement with said contact carrier 19, whereupon thecontact carrier 19 and the contact 22 drop and the latter comes intocontact with a contact 24 screwed into a longitudinally extending metalframe 26,'attached to casting 1 by a screw 27 (Fig. 3) insulated fromsaid casting by washers 28 and an insulating ring 29.

To said frame piece 26 is electrically connected bya screw 31 to aterminal 32 connected a wire 33 electrically connected to a rheostat 34,the two poles of the rheostat being connected to wires 36 connected tovopposite sides of abattery 37. The rotary member of the rheostat 34 iselectrically connected to a wire 38, which is electrically connected toa metal block 39 secured by means of screws 41 to an insulating block42, secured by screws 43 to the frame 44 of the typewriting machine.

Said metal block carries an adjustable contact 46 which is normally incontact with a contact 47 carried by an arm 48 extending from a rotarydisc 49, said arm 48 being drawn downwards, so as to make contactbetween the contacts 46 and 47, by a coiled spring 51 secured to saidarm 48 and to an arm 52 pivoted upon said block, as shown at 53, andhaving an arcuate slot 54 through which passes a set screw 56 toregulate the strength of said spring 51.

ed to a terminal 58, which terminal is supported by a screw 59 upon afiber rod 61 embedded in wax 62 cast around solenoids 63. From saidterminal 58 extend wires 64 of said solenoids, the other ends of thewires of 'said solenoids extending, as shown at 66,V

Connected to y said arm 48 is a wire 57 electrically connectfront of thecontact carriers 19, a spring Contact 23 extending from each Contact 71and contacting with a plate 74 in contact with the contact 22.

With this construction, when an operator presses a key through thedistance between the contacts 22 and 24, and closes the circuit betweenthe said contacts, the corresponding solenoid is energized, therebydrawing upwards the core 76 oit said solenoid and the rear end oil thekey Vlever 13, the trent end then descending and completing thedepression of the key bar 6 and actuating the type bar 77 by means of alink 78 pivotally connected to said key and type bars.l Before, however,the core 7 6 strikes a rubber stop 78, a protuberance 79 on the type barstrikes against an end ot a shifter S1, the other end or' which impingesagainst a roller 82 on a lever 83 and draws said lever 83 out ofengagement with an escapement wheel 84, allowing the escapeinent tooperate the carriage carrying the typewriter platen 86, so that theplaten moves slightly; at the saine time, the roller 82 operates an arin87 secured to thedisc 49 and breaks a circuit between the contacts 46and 47. Although the circuit is broken through the solenoid, the corestill moves upwards, due to its momentum, and the type bar moves onwardtowards 'the typewriter roller 8G, until the core is arrested bystriking the lower end of the rubber stop 78 secured to a nietal stop 88screwed into the upper portion ot the casing 89 for the solenoids andlocked therein by a lock-nut 90. Even after the core is arrested bystriking the rubber stop 71, the type moves Jforward to the roller S6due to the ieXibility of the type bar and makes an imprint upon theroller. Then, by reason of itselasticity the type bar immediatelyyrebounds troni the roller and is drawn back to its original positionagainst a flexible cushion 91, due to the ordinary spring 91 forretracting the type bar. These springs can be made very much strongerthan with an ordinary typewriter so that type bars can be made to comeback very much more quickly than the type bars of an ordinary typewritethus increasing the range of speed ot the operator. The power forovercoming said springs, being not now dependent upon the Xertioii o1lthe operator, but being derived from thek electric circuit, can begreatly increased without in the slightest degree increasing the work o'the operator.

The talling back ot the type bar 77 to its normal position ot rest uponthe rubber cushion 91 raises the key lever 13 and thereby raises theContact carrier 19, breaking the circuit between the contacts 22 and 24.But in order 'that the circuit between the contacts 46 and 47 may not beclosed again be foire the circuit between the contacts 22 and 24 isopened, I provide an arm 92 secured to the disc 49 and carrying anadjustable weight 93. The purpose of this arm is to increase the swingof the disc 49, taking place in the time elapsi; betveen the openingbetween the contacts 46 and 47, and the opening between the contacts 22and 24 and resisted by the coiled spring 51. But tor this arm andweight, the spring 51 would actuate the arm 48 to close the contacts 46,47, before the type bar has resumed its normal position, that is, beforethe contacts 22, 24 were opened, which would again energize the solenoidand cause an indefinite succession ct', impacts of the type bar againstthe typewriter roller. By supplying thc weightd arm 92 to the disc 49,the distance through which the disc swings is rendered so great as tocause the circuit between the contacts 46, 47 to close after the circuitbee tween the contacts 22, 24, has been opened. 4 indicates a spacingbar connected to an end o1- a spacing lever 96, the other end of whichis connected to an end oit a rod 97, the other end of which is connectedto an end ot a lever 98, pivoted at 99, the other end of said leverbeing connected to an end of a link 101, the other end 102 ot which isforked and engages a knob 103 on the lower end of the escapement leverS3, whereby said escapeinent is actuated by the depression or saidspacing bar. rllie spacing bar is also connected to a. hanger, which issupplied with contacts 22, 24, a lever 19, and solenoid G3, the same asthe keys 4.

llhe shift key 104 is likewise supplied with a hanger, contacts 22 24,lever 19 and a solenoid 63, but the shirt key, not being connected toany type bar, does not in operation swing the disc 49 and open thecircuit between the contacts 46, 47, but the circuit between thesecontacts remains closed until it is opened by the operation ot a letterkey.

Then it is desired to turn the platen, instead of shitting itlongitudinally, the rack 106 is withdrawn from the escapeinent wheel 84by means of an arm 10S (Fig. 8), having an upwardly extending linger 109adapted to be moved by the o1erator into engagement with aspring-actuated dog 111, to hold it in the upper position, the upwardmovement of the arni being limited by a stud 11 extending through a hole113 in said arin. Said arm is attached at its lower end to a slide piece114, in which said rack 106 slides. The arm 108 is normally drawn intothe po-4 sition in which said rack 106 eng is said escapenient wheel 84y coiled springs 11G. The rack 106 being drawn out ot engagement withthe escapeinent wheel 84, the platen is given a rotary motion by meansoi a pawl 117, pressed by a spring 11S against a stop 119 and carried bya lever 121 attached to a link 122, secured at its lower end to alongitudinally extending bar 123 resting upon arms 124, pivoted upon'the shaft 14 and drawn downwardly by springs 126, said bar 123extendingover the levers 13, soy that, when en one of the levers 13 isrocked upwards about its pivot 14, the bar 123 is raised, therebywithdrawing the pawl from a ratchet wheel 127 attached to the platen, sothat a downward movement of the bar actuates the pawl to advance theplaten through any desired angle. not desired to use the means foradvancing the platen circumferentially, the bar is held in a continuallyraised positionby turning the arm 124 on the shaft 1st and holding themby set screws 128. l claim t* 1. ln an electric typewriting machine, thcombination of a pivoted key bar, a contact moved thereby, a secondcontact, from contact with which the first-named contact normally heldby said key bar, an electro-V magnetic device energized by the closingoi a circuit through said contacts, a type bar moved toward the platenof the typewriting machine by the energization of said electrov imagnetic device,`and a normally closed sect in said electric circuit andopened by the movement of said type bar toward the platen of thetypewriting machine, and a weighted device movable with the movablecontact of said second pair.

3. ln an electric typewriting machine, the combination of a pivoted keybar, a contact moved thereby, a second contact, from contact with whichthe first-named contact is normally held by said type bar, an electro`f. magnetic device energized by the closing of a circuit through saidcontacts, a lever moved by the energization of said electromagneticdevice, the movement of said lever depressing` said key bar, a type baractuated by the depression of said key bar, and a normally closed secondpair of contacts in said electric circuit and opened rby thefmovementoi? said type bar toward the platen of the typcivriting machine.

e. ln an electric typewriting machine, the

combinationo' a pivoted key bar, a contactv moved thereby, a secondcontact, from conn When it isk tact with whichv the first-named contactis l normally held by said key bar, an electromagnetic device energizedby the closing ol a circuit through said contacts, a lever moved by theenergization of said electromagnetic device, the movement of said leverdepressing said key bar, a type bar actuated by the depression of saidkey bar, a normally closed second pair of contacts in said electriccircuit and opened by the movement of said type bar toward the platen ofthe .said lever depressing said key. bar, a type bar actuated by thedepression of said key bar, and a normally closed second pair ofcontacts in said electric circuit and opened by the movement of saidtype bar towards the platen of the typewriting machine.

6. ln an electric typewriting machine, the

combination of a pivoted key bar, a hanger attached thereto, a pivotedcontact carrier, a contact carried thereby, a second contact, fromcontact with which the rst-named contact is normally held by saidhanger, an electro-magnetic device energized by the closing oia circuitthrough said contacts, a lever moved by the energization of saidelectro-magnetic device, the movement of said lever depressing said keybar, a type bar actuated by the depression of said key bar, a normallyclosed second pair of contacts in said electric circuit and opened bythe movement of said type bar towards the platen of the typewritingmachine before the type bar impinges on said platen.

7. In an electric typewriting machine, the combination of a pivoted keybar,'a contact moved therewith, a second contact from contact with whichthe first-named contact is normally held by said key bar, anelectromagnetic device energized by the closing of said contacts bymovement of the key bar, a

rtype'bar moved toward the platen ofthe typewriting machine by theenergization of Said electro-magnetic device, said electric circuitbeing opened by the movement of saidtype bar toward the platen of thetypewriting machine. f

n EDWARD H. HEBERN.

